nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based  firewall rule not found. Use the iptables CT target to attach helpers instead.
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BUG: KMSAN: uninit-value in __list_add_valid+0x2a4/0x450 lib/list_debug.c:26
CPU: 1 PID: 18480 Comm: syz-executor6 Not tainted 4.19.0-rc1+ #40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x14b/0x190 lib/dump_stack.c:113
 kmsan_report+0x183/0x2b0 mm/kmsan/kmsan.c:956
 __msan_warning+0x70/0xc0 mm/kmsan/kmsan_instr.c:645
 __list_add_valid+0x2a4/0x450 lib/list_debug.c:26
 __list_add include/linux/list.h:60 [inline]
 list_add_tail include/linux/list.h:93 [inline]
 cma_listen_on_all drivers/infiniband/core/cma.c:2364 [inline]
 rdma_listen+0x790/0x1100 drivers/infiniband/core/cma.c:3381
 ucma_listen+0x4fa/0x630 drivers/infiniband/core/ucma.c:1096
 ucma_write+0x594/0x600 drivers/infiniband/core/ucma.c:1680
 __vfs_write+0x1a8/0xa50 fs/read_write.c:485
 vfs_write+0x495/0x8e0 fs/read_write.c:549
 ksys_write fs/read_write.c:598 [inline]
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write+0x173/0x350 fs/read_write.c:607
 __x64_sys_write+0x4a/0x70 fs/read_write.c:607
 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457099
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fd5eab8cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd5eab8d6d4 RCX: 0000000000457099
RDX: 0000000000000010 RSI: 0000000020000180 RDI: 0000000000000004
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d7c68 R14: 00000000004ca9bf R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:256 [inline]
 kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:181
 kmsan_kmalloc+0x98/0x100 mm/kmsan/kmsan_hooks.c:91
 kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan_hooks.c:100
 slab_post_alloc_hook mm/slab.h:446 [inline]
 slab_alloc_node mm/slub.c:2719 [inline]
 __kmalloc_node_track_caller+0x9e7/0x1160 mm/slub.c:4352
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x2f5/0x9e0 net/core/skbuff.c:206
 alloc_skb_fclone include/linux/skbuff.h:1038 [inline]
 sk_stream_alloc_skb+0x172/0xc90 net/ipv4/tcp.c:874
 tcp_sendmsg_locked+0x269e/0x68f0 net/ipv4/tcp.c:1286
 kernel_sendmsg_locked+0x21e/0x2e0 net/socket.c:653
 sock_no_sendpage_locked+0x1bd/0x250 net/core/sock.c:2655
 tcp_sendpage_locked net/ipv4/tcp.c:1076 [inline]
 tcp_sendpage+0x154/0x240 net/ipv4/tcp.c:1090
 inet_sendpage+0x4fb/0x8b0 net/ipv4/af_inet.c:815
 kernel_sendpage net/socket.c:3321 [inline]
 sock_sendpage+0x1ef/0x2e0 net/socket.c:846
 pipe_to_sendpage+0x31d/0x430 fs/splice.c:452
 splice_from_pipe_feed fs/splice.c:503 [inline]
 __splice_from_pipe+0x49f/0xf30 fs/splice.c:627
 splice_from_pipe fs/splice.c:662 [inline]
 generic_splice_sendpage+0x1c2/0x2a0 fs/splice.c:833
 do_splice_from fs/splice.c:852 [inline]
 direct_splice_actor+0x19e/0x200 fs/splice.c:1019
 splice_direct_to_actor+0x746/0xfb0 fs/splice.c:974
 do_splice_direct+0x332/0x540 fs/splice.c:1062
 do_sendfile+0x1070/0x1d80 fs/read_write.c:1440
 __do_sys_sendfile64 fs/read_write.c:1495 [inline]
 __se_sys_sendfile64+0x1c2/0x380 fs/read_write.c:1487
 __x64_sys_sendfile64+0x56/0x70 fs/read_write.c:1487
 do_syscall_64+0xb8/0x100 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
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